<template>
  <view>
    <view class="goods-item">
      <view class="goods-item-left">
        <!-- 使用 v-if 指令控制 radio 组件的显示与隐藏 -->
        <radio :checked="goods.goods_state" color="#C00000" v-if="showRadios" @click="radioClickHandler"></radio>
        <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      </view>
      <view class="goods-item-right">
        <view class="goods-name">{{goods.goods_name}}</view>
        <view class="goods-info-box">
          <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
          <uni-number-box :min="1" :value="goods.goods_count" v-if="showNumberBox" @change="numChangeHandler"></uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    name: "my-goods",
    props: {
      goods: {
        type: Object,
        default: {}
      },

      // 添加一个属性 用来控制radio是否显示
      showRadios: {
        type: Boolean,
        default: false
      },
      
      // 添加一个属性 用来控制 uni-number-box 是否显示
      showNumberBox: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    filters: {
      tofixed: function(num) {
        return Number(num).toFixed(2);
      }
    },
    methods: {
      // radio 组件的点击事件处理函数
      radioClickHandler() {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change', {
          goods_id: this.goods.goods_id,
          // 商品最新的勾选状态 取反
          goods_state: !this.goods.goods_state
        })
      },
      
      // NumberBox 组件的 change 事件处理函数
      numChangeHandler(val) {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          // 商品的最新数量
          goods_count: val - 0
        })
      }
    }
  }
</script>

<style lang="scss">
  .goods-item {
    width: 750rpx;
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1rpx solid #f0f0f0;

    .goods-item-left {
      margin-right: 5px;
      display: flex;
      align-items: center;
      justify-content: center;

      .goods-pic {
        width: 200rpx;
        height: 200rpx;
        display: block;
      }
    }

    .goods-item-right {
      display: flex;
      flex: 1;
      flex-direction: column;
      justify-content: space-between;

      .goods-name {
        font-size: 26rpx;
      }

      .goods-info-box {
        display: flex;
        justify-content: space-between;
        align-items: center;
         
        .goods-price {
          font-size: 34rpx;
          color: #c00000;
        }
      }
    }
  }
</style>
